<!DOCTYPE html>
<html>

<head>
    <title>My Test Extension Options</title>
    <style>
        body {
            padding: 1em;
            min-width: 10em;
        }

        #options {
            margin-bottom: 1em;
        }

        #options>div {
            padding-block: .5em;
            vertical-align: middle;
        }
    </style>
</head>

<body>
    <form id="options_form">
        <div id="options"></div>
        <button id="save">Save</button>
    </form>

    <script src="options.js"></script>
</body>

</html>